Each project will involve solving unique challenges while handling the following core responsibilities: Efficiently gain familiarity with the design and implementation of existing codebases. Contribute to the design of application, framework, or daemon security hardening projects by implementing new or existing components in Swift. Design maintainable libraries that use the Swift type system to present safe interfaces while working within the performance constraints required of OS software. Adopt or update isolated unit testing to thoroughly exercise changes; collaborate with QA engineers on functional testing. Document changes and new architectural elements, creating training materials required for partner team to maintain changes going forward. Communicate collaboratively and effectively during all project phases.